Tuttnauer 3840 ELVG-D, Руководство по эксплуатации и техническому обслуживанию

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Page 18 of 75 Pages
3.13 Description of Operation
3.13.1
Heat
The ELV vertical autoclaves are equipped with immersion type,
heating elements. After water has been introduced to the
chamber and the unit has been activated, the heating elements
begin to heat. The temperature and pressure in the chamber
increase until appropriate levels are reached. Sensors located
inside the chamber control the temperature and pressure levels.
3.13.2
Sterilization
The sterilization temperature is factory set at 134

C (273

F) for
instruments and at 121

C (250

F) for liquids and other materials
for which this temperature is appropriate. These settings may be
modified before each cycle. When sterilization temperature is
reached, the timed sterilization cycle begins.
3.13.3
Cooling
The autoclave is designed to operate two liquid cooling cycles,
as follows:
3.13.3.1 Sealed bottles (cooling with compressed air)
On completion of the sterilization stage, feed water
starts flowing through the cooling coil mounted
around the outer side of the chamber.
Compressed air is injected inside the chamber and
keeps a constant air pressure to balance the internal
pressure of the liquids inside the bottles. Compressed
air is passed through a 0.2µ microbiological filter.
When temperature of the liquids reaches the final set
temperature, the cooling stage is completed, flowing
water and compressed air is stopped, pressure in the
chamber goes down to atmospheric pressure.
At this stage, the door of the autoclave can be opened
and the sterilized materials can be taken out of the
chamber.
3.13.3.2 Unsealed bottles (cooling without compressed air)
On completion of sterilization, steam is exhausted
from the chamber at a slow rate. When chamber
pressure goes down to atmospheric pressure, water
starts flowing through the cooling coil mounted
around the outer side of the chamber. On conclusion
of the cycle the water flow is stopped automatically,
process is completed and it is possible to open the
door and take out the sterilized goods from the
chamber.
3.13.4
Exhaust
When the timed sterilization cycle is complete, the unit enters
into the exhaust stage, provided that a program other than the
liquid program was selected. The steam is exhausted from the